Doing meaningless thing is called wasting time. It was not wasting time when I spent 200 hours to get a high level character with the build I wanted. I could still happily play this game after that. You cannot say these 200 hours are meaningless because the result is good. But if I spent 200 hours and everything was good until I clicked wrong when I chose R7 class, that was wasting time.
For myself I didn’t screw up my build, but I really know the feeling that character ruined after one single click.

Most people here only care about what they need and never think about others.